TW200415585A - Reproducing control method of optical disc driver and the optical disc driver - Google Patents

Abstract

In a method of controlling data reproduction in an optical disk drive, when a decoding error occurs, decoding is performed by changing a servo parameter. Thus, the decoding errors are reduced while playability is improved. The method of controlling data reproduction in an optical disk drive for reading data stored on an optical disk is performed by monitoring whether a decoding error occurred at a host part, if a decoding error occurred, changing a servo parameter for adjusting balance and/or offset of error signal which input to servo system, and rereading a portion on the optical disk medium where the decoding error occurred using the changed servo parameter and performing decoding.

Description

200415585

The invention is not a mistake. The decoding technology in the system. It is from the optical drive to actuate and drive the 5 machines, and the decoding is wrong. The servo is less. [The previous machine ’s main unit was the servo unit ’s drive part. The signal is related to controlling the type of optical disc in the optical disc drive. The data reproduction and related optical discs can be decoded by changing the servo spring material reproduction method when the balance & number of error signals occurs to input errors. U / or compensation is adjusted, and then the reduction can be subdivided into—the host part, the host part belongs to the steam ratio feeding part and a machine instruction to drive the machine: go up and the servo part receives from the disc medium Information, the: section. Mechanical device part; recitation 2, part assigned reading address, α. The drive device and drive spindle of the mechanical device part of the through book are placed in the cover with the cover # Μ #Virtual = through appropriate The mechanical Pei Zhiyue can read the analog signal from the disc medium (Anai〇gv servo part reads the radio frequency (RF) signal read from the disc medium: the knife is cut into divided signals to prepare a specific type The data will be prepared and transmitted to the host. The host performs demodulation, (demodulation) and error correction based on the data to reproduce the image and sound. In the above steps, if an image data error occurs Waiting for mistakes, especially for bad # images, or abnormal movies, mainly originated from the mechanical part. In the mechanical part, data errors are frequently generated from the read head (PUH), and The causes of data errors from the read head can generally be divided into unbalanced servo tracking and defective optical discs.

200415585 V. Description of the invention (2) It is caused by the difference between the allowable errors between the constituent optical signals. Also capacitors, amplifiers and other devices. Among the specific allowable errors, it is because in the manufacturing process of the optical disc, the defective stamper and the injection stage are engraved in the >time; the end user's $ ° due to the defect of the media, However, it is no longer possible to reproduce the letter from the optical disc. First, the unbalanced servo tracks the circuit surrounding the servo circuit, that is, the circuit contains resistors, but the appropriate values of these devices are located on each other, which may cause unbalanced servos. track. In addition, defective discs are produced from the start-up process (Mastering prault, damaged substrates in the segment, or defective temporary storage) may also cause discs to appear flawed, which can be properly servo-tracked, and can be numbered. When an error occurs, there is no choice but to wait for the servo system. In the preset image or the previous image frame is reproduced, however, in the traditional optical disc drive, after the time elapsed except for a preset period of time, then The local content will be displayed in order to solve the above and / or other problems. The method of controlling data reproduction in the machine. When two codes occur-a servo parameter is changed on the optical disc to decode 'to input to the server m φ can be changed by changing = And, or compensation to make adjustments, according to this can reduce the solution 22: error signal good playback function. Decoding error, and then the invention also provides a kind of implementation of this optical disc control The main purpose of the present invention is to provide +2 optical disc drive The method is to read the data stored on the optical disc and control the data, which includes monitoring

200415585 V. Description of the invention (3) Whether there is a decoding error in the host part-^-'Then change the feed service Yanhuang Su' if you explain the solution ^ Huan a Heng and / or "Take ::: Engineering system error 2 :: ΐ ϊί The part of the disc media that caused the decoding error to occur, re-read Beco. I decode and re-read the better servo parameters to change the step jitter f to measure the measured jitter value and change the feeding parameters ^ to reduce The best step for changing the servo parameters is A. There is one servo parameter described below: (1) Adjustment ", Poly servo ^ $ The parameter contains the parameter to compensate or balance the error signal used = CUS servo) = acklng coffee.) The error signal (flat) used is: 4 servo: The t 'servo parameter of the present invention is defined as a servo parameter used to adjust the balance of the error signal of the input cause: the system. It is better to change the parameters of the temple service. Sub-steps to reduce the jitter value: 乂 Naba includes the following (-) comparison of the five aspects of the interaction between the jitter value and each parameter value, and (a) the decision to optimize the digital jitter value Servo parameter value. Another object of the present invention is to provide Species optical disc drive, comprising a basin performing at least one servo function to read the servo part of the disk stored in the sheet information, and a digital signal processor performs digital signal processing

INVENT20030825PI28.ptd Page 7 200415585 V. Description of the Invention (4) (DSP, Digital Signal Processor) Among them, Digital Signal Processor (Dsp) = Decoding Error Controller 3 whether decoding error occurs 3 ~ It is used to decide to change the servo parameters , And use the changed feeding U code error occurred, the part of the disc media decoding error occurred. 〃 'Re-reading the better optical disc drive further includes a material to measure the jitter value of the decoded pulse, and digitally measure Deping == copies, which is used to solve: the error controller changes the servo parameters to make: the dynamic value Upper ::: The system of == :: 2: The second: Yu; = machine: Control the data in the data f㈣ 廿 jiuyou film, the steps of whether there is a decoding error in the host part; if a decoding error occurs , Then change the equalization (EQ) parameter to find the optimal gain of the RF signal input to the equalization (EQ) system, and use the changed servo parameters to re-read a decoding error in the optical disc medium , And then read the data again. The equalization (Eq) part (2 2 6) uses a preset magnification to increase the benefit of the RF signal input, and the gain signal is input to a data splitter. Recently, almost all parts used to obtain signals have been widely used.

Generally speaking, it is regarded as a servo part. Therefore, the servo part (2 2) shown in the second figure includes an equalization (EQ) part (226). In addition, the equalization (EQ) parameters are also described in the following description. It is considered as a servo parameter. [Embodiment] The optical disc drive according to the preferred embodiment of the present invention, referring to the second figure, includes a read head (PUH) unit (204), a servo section (22), and a digital signal processor (DSP) section. (24).

INVENT20030825PI28.ptd Page 8 200415585 V. Description of the invention (5) Among them, the read head (PUH) unit (204) can read optical signals from the optical disc (202). 0 The servo part (22) performs the servo function to read. Stored in the disc tracking section (2 0 2), and includes a focusing section (2 2 2) (224) and an equalization (eq) section (226) digital signal processor (DSP) section (24 ) Performs digital signal processing 'and includes an MPEG decoder (242), a decoding error controller (244), and a jitter evaluation section (2 4 6). For the operation of the optical disc drive with the above structure, please refer to the first picture. ♦ <two t, Ϊ: wrong; the controller (244) detects a decoding error "occurrence situation &lt; S102 &gt;, and further determines whether the decoding error has occurred in S1 〇 At 4 o'clock, it is determined that a decoding error has occurred, and the servo parameter S = &gt; right 106 &gt;, the better step is to solve the decoding error; '(244) i MPEG ^ ,, (242) ^ err 〇r_dec (Ϊί 以 平 ίΠΐfeeding parameters, in order to adjust the balance of the error input to the servo system, or adjust the servo corresponding to FOC_ERR0R (Polymer Calcium) In the first picture, focus on TRA— ERROR (Tracking error) ^ ^) 彳 ° 旎, the tracking server corresponding to the send: two ':: two = system) They decided if there is 4 o'clock = No: occurred <Chuan ... number; the better step is When an error occurs in the decoding (EQ) parameter (244) from MPEG decoding, the decoding error controller $ benefit (242) receives the ERR〇R_DEc (decoding error) letter page 9 INVENT20030825PI28. ptd 200415585 5. Description of the invention (6), the decoding error controller (244) changes the equalization (EQ) parameter;

Q) &gt; number to provide the best gain for input to the data slicer iRF ^; In contrast to the second picture, EQ_BST (equivalent EQ parameters are not preset. Open) 仏 = = according to this Invented, the method of controlling data reproduction in the optical disk drive, and the method of = data in the film, includes the step of monitoring the degeneration in the host part 'if the decoding error occurs, change the equalization,' to achieve input equalization (EQ) System, ^ = re-read the changed feeding parameters on the disc medium: ;;; error; (226) and decode the re-acquired data; equalization (EQ) part to the data splitter; recently, almost all uses In order to obtain two "is widely regarded as the feeding part: the second description content, etc .: ί ΐ,) part (226); In addition, the equalization parameter in this book is described later. Service parameters = steps, refer to the third The feeding parameters in Fig. 1 are used as the reference point of 0) "0" (32), which and / or compensation, and appear to be jealous (30): the balance of the block number of Τ 糸 system is used to It is possible that he can operate the parameters of the disparate signal (30), which may be Youyou's ② the definition of the predecessor d response state and the system of confessions, τ, ， 5 will be used to adjust the input to the servo system Ⅱ ## Say that the balance and / or compensation is at the reference point 丨, 0 丨 丨 (3 2) · + y-, ",, servo, several ports are again Maintain, say, in the method of the present invention,

200415585 1 —_ 丨 _ V. Explanation of the invention (7) The parameters of the error letter and input to the servo system will be changed. ①, mouth and / or compensation focus servo when a decoding error occurs (time is ^), / program to change feeding parameters to input to feed; two: a program standard balance and / or compensation to adjust; in software The department, the first, the wrong signal runs flat. Jiaojun's Servo Reference Level (34) In the previous example, compared with the example of the focus servo setting (32), the experimental results show that when ^ is at the reference point &quot; 〇 &quot; the same focus feeding parameters can improve the disc The service settings are not maintained in the above embodiments, although they are adjusted for adjustment;: No. Parameters, the same principle can also be applied to the servo clothing of chasing feed; that is, according to the present invention, the servo parameters of the focus servo, H (EQ) servo, or a combination of the three: :: service and Equalization is performed in multiple steps of changing the servo parameters and the modification of the milk parameters. When the servo parameters are decoded and re-experimented, the second most important is to change the feed parameters continuously; in addition, in the feed test, : Various servos can be continuously changed according to a preset order. Continue to explain how to change the servo parameters: &gt; Number. In this embodiment, the jitter evaluation section (246) measures the jitter value and digitizes the jitter value after the measurement. ; Decoding error ^; Pulse (244) changes the servo parameter, and accordingly reduces the jitter evaluation part (246 ^ = Momentum --jmER-VALUE to a minimum; that is, the decoding error controls jitter U44) against the jitter value And the preset correlation between each servo parameter-Part 1 Page 11 INVENT20030825PI28.ptd V. Description of the invention (8) Information and determine each optimization. The appropriate value for the country to make the digital jitter value by Control jitter value to change feeding According to the steps determined by the previous experimental results, after referring to the fourth figure, when the decoding error occurs, the correlation between the jitter value and the jitter parameter value α; that is, it is determined that the jitter value can be reduced. To the smallest PAR gauge 〇d, change the feed parameters before; the servo parameters after the column equation can explain the relationship between I · MA PARAM ^, and the difference is α, the next PARAM- = pARAMorg + α in the traditional optical disc In the machine, the servo program is executed by [/ equation 1]; however, according to the error signal entered into the feeding system by the error signal of the second service system of the present invention, it is done = wrong; The value is defined as α read: the error controller (244) controls the feed service part (3). The parameter PARAM_read the optical disc media use change after the decoding error occurs on the first media. Kill; 丨 the error occurred on the part of the horse &lt; S1 〇8 &gt; code &lt; si? 〇t; 2 ::: The device (J42) uses the reread data to execute the solution, / A 3 / new read When decoding the data, the MPEG decoder (242) never decides whether a decoding error occurs &lt; sl2〇 &gt; Error 'No error Normal decoding &lt; S122 &gt; is executed; if a decoding error occurs, confirm and determine whether the buffer is empty <sl3〇 &gt;; if the buffer is not empty, change the servo parameter weight in a preset order Try decoding; if at step si 3〇 ^ page 12 INVENT20030825PI28.ptd 200415585 V. Description of the invention (9) If the buffer is empty, the corresponding frame will be confirmed &lt; 132 &gt; that is, the empty frame; because At present, the normal optical disc is at least twice as fast as the EG decoding. The above servo parameters can be changed and the disc can be decoded and then tested again. Data change and traditional methods of controlling data reproduction in the optical disc drive occur when there is no solution except to wait a preset time

Based on the method for controlling data reproduction in the optical disc drive described above, when an error occurs: the training parameters are changed 'and the decoding error is changed = the parameters are read again and will be executed again; Z

=: Code errors are actively handled. It can be seen through actual experiments that code errors are reduced, which can improve the playback function. ^ In the optical disc drive of the present invention, the above-mentioned method for controlling data reproduction can be understood by a program. The computer program is read by the microcomputer, and accordingly ^ stored in the semiconductor memory such as read-only memory = (二 、 电 (EPR0M) UEPROM) and flash memory (F1 or other communication network download. 讣 mem〇ry) , Or as described on the Internet, the method for controlling remanufacturing in the optical disc drive of the present invention, when the latter two Ϊ ί 重 重: the service parameters are changed; 'then, by changing r through the application; playing π: CD The ministry of the media has tried new solutions to improve the playback function. ^ n

200415585 Schematic illustration of the first diagram · The flow chart of the optical method of the preferred embodiment of the present invention, the control data reproduction second diagram: In the preferred embodiment of the present invention ^ The schematic block diagram of the master of the disc player J Wang Figure 2 illustrates the signal of the step of changing the servo parameter of Juyuan 1 in the present invention. The fourth diagram: explains the curve of the parameter changing step related to the jitter value in the present invention. Changing the focus servo pattern reference number: [Invention] &lt; S1 0 2 &gt; Detect occurrence of decoding error &lt; S104 &gt; Whether decoding error has occurred &lt; S1 0 6 &gt; Change servo parameter &lt; S1 08 &gt; Re-read using changed servo parameter Part of the error caused by the error of light extraction% &lt; S1 1 0 &gt; Perform decoding &lt; S122 &gt; Error-free normal decoding &lt; S1 3 2 &gt; Confirmation is error (20 2) Disc (22) Servo part ( 224) Tracking section &lt; S120 &gt; Whether decoding error occurred &lt; S130 &gt; Whether the buffer is empty (204) Read head (PUH) unit (222) Focus section (22 6) Equalization (EQ) section (24) Digital Signal Processor (DSP) section (242) MPEG decoder (244 Decoding error controller

Page 14 INVENT20030825PI28.ptd 200415585 Brief description of the diagram (246) Jitter evaluation section (30) Dissimilar signals (32) Reference point π 0 ”(34) Servo reference level i INVENT20030825PI28.ptd Page 15

Claims (1)

200415585 6. Scope of patent application1. A part of the disk control medium that monitors the use of the system if a system error occurs. 2) If the method is applied, it measures the digitization of the solution to change the balance and / or 3. Method, its (EQ) servo 4. As the method of application, its sub-steps: making disc drive data, servo of the disc drive's decoding error signal after flattening, and performing the jitter measurement of the servo parameter pulse in the patent range Servo parameters, compensation, come from the patent scope of the servo or three of the patent scope changes Servo reference jitter value to determine the servo parameter value of the adjustment wheel, the minimum 0 method of data reproduction, you punch 6 ^ The light includes the following steps: Whether the host part has a decoding error; then change the parameters, balance and / or compensation; re-read the service parameters; decode errors in the disc medium; and decode the data after re-reading. The step of controlling data reproduction in the optical disc drive described in item 1 includes the following sub-steps: jitter value; dynamic value; adjusting the error signal input to the servo system to minimize the jitter value. The data reproduction in controlling the optical disc drive described in item 2 is selected from a combination of focus servo, tracking servo, and equalization. The steps of controlling the data in the optical disc drive to re-uniform the parameters described in item 2 to reduce the jitter value include the following information about the interaction with the feeding parameters, · The error signal balance into the servo system and / or compensation for the error in the temple service The digital jitter value on the system is reduced to 5. Controlling data reproduction in the optical disc drive as described in item 4 of the scope of patent applications INVENT20030825PI28.ptd 200415585 6. Scope of Patent Application 1 Method ’The servo is selected from the focus servo, tracking servo (EQ) servo, or a combination of the three. 6. An optical disc drive device, including: a servo part for performing a servo function to make it easier to read the stored data; stored in a disc medium first; performing digital signal processing of digital signal processing, among which digital signal processing The DSP (DSP) part includes the decoding error control of some servo parts or a part of them. If there is a decoding error, u When a code error occurs, change the servo parameters and use the changed server. The parameter re-reads the part where the decoding error occurred in the disc medium. 4 7. According to the optical disc drive device described in item 6 of the scope of the patent application, a wide range of decoded pulses are measured and the jitter value is digitized. 3 measurements are minimized. The Chinese decoding error controller changes the feeding parameters so that the jitter value conforms to the optical disc drive device described in item 6 of the second patent range, wherein the feeding group is Ϊ. Focus servo, tracking servo, equalization (EQ) servo, or three of them Calcium 9 error ϊ! 丨 的 The optical disc drive device described in item 6 of the profit range 'where decoding = t' uses the interaction between the jitter value and the servo parameter value Relational information: Determine the feeding parameter values that optimize the digitalized jitter value. The optical disc drive device described in item 9 of the patent scope of the service, wherein the servo is selected to control the feed parameters used to adjust or balance the error signal input to the feed system, and the servo system is selected from INVENT20030825PI28.ptd Page 7 200415585 VI. Scope of patent application Servo, tracking servo and equalization (EQ) servo or a combination of the three. 11 · A method for controlling data reproduction in the optical disc drive to read the data stored in the optical disc medium, which includes the following steps: The host part of the optical disc drive monitors whether a decoding error occurs; if a decoding error occurs, change the equalization (EQ) parameter to obtain the optimal gain of the RF signal of the input data splitter; use the changed equalization (EQ) parameter to re-read the part where the decoding error occurred in the optical disc medium and execute the re-read data Of decoding. INVENT20030825PI28.ptd Page 18